2013-12-13 21:24:03 +00:00
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; RR-Net driver, as seen on a VIC-20 (i.e. using a MasC=uerade adapter)
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.export cs_init
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.export cs_packet_page
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.export cs_packet_data
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.export cs_rxtx_data
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.export cs_tx_cmd
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.export cs_tx_len
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.export eth_driver_name
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.export eth_driver_io_base
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rr_ctl = $9801 ;address of 'control' port on Retro-Replay
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cs_packet_page = $9802 ;address of 'packet page' port on RR-Net
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cs_packet_data = $9804;address of 'packet data' port on RR-Net
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cs_rxtx_data = $9808 ;address of 'recieve/transmit data' port on RR-Net
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cs_tx_cmd = $980c;address of 'transmit command' port on RR-Net
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cs_tx_len = $980e;address of 'transmission length' port on RR-Net
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.code
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;initialise Retro Replay so we can access the network adapter
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;inputs: none
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;outputs: none
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cs_init:
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lda rr_ctl
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ora #1
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sta rr_ctl
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rts
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.rodata
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eth_driver_name:
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.asciiz "VIC20 RR-NET"
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eth_driver_io_base:
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.word rr_ctl-1
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;-- LICENSE FOR vic20-rr-net.s --
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; The contents of this file are subject to the Mozilla Public License
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; Version 1.1 (the "License"); you may not use this file except in
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; compliance with the License. You may obtain a copy of the License at
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; http://www.mozilla.org/MPL/
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;
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; Software distributed under the License is distributed on an "AS IS"
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; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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; License for the specific language governing rights and limitations
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; under the License.
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;
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; The Original Code is ip65.
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;
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; The Initial Developer of the Original Code is Jonno Downes,
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; jonno@jamtronix.com.
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; Portions created by the Initial Developer are Copyright (C) 2009
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; Jonno Downes. All Rights Reserved.
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; -- LICENSE END --
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